linux-kernel - Re: [PATCH] [media] Add RGB444_1X12 and RGB565

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Date:	Fri, 14 Nov 2014 16:04:46 +0100
From:	Boris Brezillon <boris.brezillon@...e-electrons.com>
To:	Sakari Ailus <sakari.ailus@....fi>
Cc:	Mauro Carvalho Chehab <m.chehab@...sung.com>,
	Hans Verkuil <hans.verkuil@...co.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	linux-media@...r.kernel.org, linux-api@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org
Subject: Re: [PATCH] [media] Add RGB444_1X12 and RGB565_1X16 media bus
 formats

Hi Sakari,

On Fri, 14 Nov 2014 15:58:31 +0200
Sakari Ailus <sakari.ailus@....fi> wrote:

> Hi Boris,
> 
> On Fri, Nov 14, 2014 at 11:36:00AM +0100, Boris Brezillon wrote:
> > Add RGB444_1X12 and RGB565_1X16 format definitions and update the
> > documentation.
> > 
> > Signed-off-by: Boris Brezillon <boris.brezillon@...e-electrons.com>
> > Acked-by: Mauro Carvalho Chehab <mchehab@....samsung.com>
> > ---
> >  Documentation/DocBook/media/v4l/subdev-formats.xml | 40 ++++++++++++++++++++++
> >  include/uapi/linux/media-bus-format.h              |  4 ++-
> >  2 files changed, 43 insertions(+), 1 deletion(-)
> > 
> > diff --git a/Documentation/DocBook/media/v4l/subdev-formats.xml b/Documentation/DocBook/media/v4l/subdev-formats.xml
> > index 18730b9..8c396db 100644
> > --- a/Documentation/DocBook/media/v4l/subdev-formats.xml
> > +++ b/Documentation/DocBook/media/v4l/subdev-formats.xml
> > @@ -563,6 +563,46 @@
> >  	      <entry>b<subscript>1</subscript></entry>
> >  	      <entry>b<subscript>0</subscript></entry>
> >  	    </row>
> > +	    <row id="MEDIA-BUS-FMT-RGB444-1X12">
> > +	      <entry>MEDIA_BUS_FMT_RGB444_1X12</entry>
> > +	      <entry>0x100d</entry>
> > +	      <entry></entry>
> > +	      &dash-ent-20;
> > +	      <entry>r<subscript>3</subscript></entry>
> > +	      <entry>r<subscript>2</subscript></entry>
> > +	      <entry>r<subscript>1</subscript></entry>
> > +	      <entry>r<subscript>0</subscript></entry>
> > +	      <entry>g<subscript>3</subscript></entry>
> > +	      <entry>g<subscript>2</subscript></entry>
> > +	      <entry>g<subscript>1</subscript></entry>
> > +	      <entry>g<subscript>0</subscript></entry>
> > +	      <entry>b<subscript>3</subscript></entry>
> > +	      <entry>b<subscript>2</subscript></entry>
> > +	      <entry>b<subscript>1</subscript></entry>
> > +	      <entry>b<subscript>0</subscript></entry>
> > +	    </row>
> > +	    <row id="MEDIA-BUS-FMT-RGB565-1X16">
> > +	      <entry>MEDIA_BUS_FMT_RGB565_1X16</entry>
> > +	      <entry>0x100d</entry>
> > +	      <entry></entry>
> > +	      &dash-ent-16;
> > +	      <entry>r<subscript>4</subscript></entry>
> > +	      <entry>r<subscript>3</subscript></entry>
> > +	      <entry>r<subscript>2</subscript></entry>
> > +	      <entry>r<subscript>1</subscript></entry>
> > +	      <entry>r<subscript>0</subscript></entry>
> > +	      <entry>g<subscript>5</subscript></entry>
> > +	      <entry>g<subscript>4</subscript></entry>
> > +	      <entry>g<subscript>3</subscript></entry>
> > +	      <entry>g<subscript>2</subscript></entry>
> > +	      <entry>g<subscript>1</subscript></entry>
> > +	      <entry>g<subscript>0</subscript></entry>
> > +	      <entry>b<subscript>4</subscript></entry>
> > +	      <entry>b<subscript>3</subscript></entry>
> > +	      <entry>b<subscript>2</subscript></entry>
> > +	      <entry>b<subscript>1</subscript></entry>
> > +	      <entry>b<subscript>0</subscript></entry>
> > +	    </row>
> >  	  </tbody>
> >  	</tgroup>
> >        </table>
> > diff --git a/include/uapi/linux/media-bus-format.h b/include/uapi/linux/media-bus-format.h
> > index 23b4090..cc7b79e 100644
> > --- a/include/uapi/linux/media-bus-format.h
> > +++ b/include/uapi/linux/media-bus-format.h
> > @@ -33,7 +33,7 @@
> >  
> >  #define MEDIA_BUS_FMT_FIXED			0x0001
> >  
> > -/* RGB - next is	0x100e */
> > +/* RGB - next is	0x1010 */
> >  #define MEDIA_BUS_FMT_RGB444_2X8_PADHI_BE	0x1001
> >  #define MEDIA_BUS_FMT_RGB444_2X8_PADHI_LE	0x1002
> >  #define MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE	0x1003
> > @@ -47,6 +47,8 @@
> >  #define MEDIA_BUS_FMT_RGB888_2X12_BE		0x100b
> >  #define MEDIA_BUS_FMT_RGB888_2X12_LE		0x100c
> >  #define MEDIA_BUS_FMT_ARGB8888_1X32		0x100d
> > +#define MEDIA_BUS_FMT_RGB444_1X12		0x100e
> > +#define MEDIA_BUS_FMT_RGB565_1X16		0x100f
> 
> I'd arrange these according to BPP and bits per sample, both in the header
> and documentation.

I cannot keep both macro values and BPP/bits per sample in incrementing
order. Are you sure you prefer to order macros in BPP/bits per sample
order ?

-- 
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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